US4379961A - Method of making an apparatus containing a diaphragm - Google Patents

Method of making an apparatus containing a diaphragm Download PDF

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Publication number
US4379961A
US4379961A US06/197,517 US19751780A US4379961A US 4379961 A US4379961 A US 4379961A US 19751780 A US19751780 A US 19751780A US 4379961 A US4379961 A US 4379961A
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US
United States
Prior art keywords
ring
rim
ring element
corrugated tube
alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/197,517
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English (en)
Inventor
Jorn M. Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
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Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
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Publication of US4379961A publication Critical patent/US4379961A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/30—Features relating to electrodes
    • B23K11/3081—Electrodes with a seam contacting part shaped so as to correspond to the shape of the bond area, e.g. for making an annular bond without relative movement in the longitudinal direction of the seam between the electrode holder and the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0004—Resistance soldering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
    • B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells

Definitions

  • the invention relates to a method of making an apparatus containing a diaphragm, wherein a thin-walled diaphragm element, particularly a corrugated tube, is connected to a flange-forming ring, and to an apparatus for performing this method.
  • Diaphragm elements such as those used for thermostats, prossostats and many other purposes must be of very thin material, generally a thickness of only 0.1 mm, so that sufficient mobility is provided during operation. This applies to plate-shaped diaphragm elements as well as to diaphragm elements in the form of a corrugated tube or bellows.
  • plate-shaped diaphragm elements as well as to diaphragm elements in the form of a corrugated tube or bellows.
  • soldering has been employed for the purpose of sealingly connecting the corrugated tube to the flange or other parts. This soldering has the advantage that temperature stressing of the thin-walled material is kept low.
  • the invention is therefore based on the problem of providing a method of making an apparatus containing a diaphragm, particularly a corrugated tube, in which substantially higher operating temperatures are permissible and, if the apparatus contains a filling interfering influences on the characteristic of this filling are avoided.
  • the diaphragm element is provided with an oblique rim extending at an angle to the axis of the diaphragm element, but the ring has a circular edge of a diameter between the internal and external diameters of the oblique rim, that between the oblique rim and the circular edge there is arranged a thin surface layer produced by chemical nickel plating, and that the oblique rim and longitudinal edge are pressed together by two axially relatively movable electrodes and are interconnected by the passage of a current.
  • these features provide a sealed joint between the diaphragm element and the flange without vaporising the thin-walled material or making it brittle by excessively high temperatures.
  • the temperature loadability of this joint is several hundreds of degrees Celsius. Falsification of the characteristic of a filling by reason of ejected flux is not possible.
  • the thin-walled material would be destroyed. It should therefore appear that the use of a surface layer produced by chemical nickel plating results in a modification leading to something between soldering and welding.
  • the surface layer which, in contrast with electrolytic nickel plating, does not consist of pure nickel but also contains a proportion of phosphorus, has a substantially higher electric resistance than the ring material and the diaphragm material. Consequently heating is concentrated in the surface layer.
  • the melting temperature is at about 900° C. This temperature is therefore achieved when the ring and diaphragm materials have been heated to much lower temperatures.
  • the surface layer is applied to the ring at least in the region of the circular edges.
  • the material of the diaphragm element need then not be subjected to a chemical nickel bath which could detrimentally influence the properties of the material.
  • diaphragm element substantially of a copper alloy such as brass or tin bronze.
  • a ferrous compound such as steel is recommended for the ring material.
  • a copper alloy such as brass.
  • Another choice is a chrome-nickel alloy.
  • the oblique rim is formed at the open end of a corrugated tube which is closed at one end.
  • the finished apparatus will then contain a bellows.
  • the corrugations which are primarily responsible for the mobility have a more or less large spacing from the oblique rim and are therefore no more than negligibly affected by the heating.
  • a cylindrical corrugated tube blank is stiff and therefore easy to handle. In addition, it can withstand considerable pressure.
  • the corrugated tube blank and the ring are pushed over each other, both are axially supported in a predetermined relative position, and the oblique rim is then produced by widening that part of the blank which projects beyond the circular edge.
  • the oblique rim and the circular edge will then be disposed in the very position required for the joining step.
  • the oblique rim can be produced by means of an electrode if this has a conical end face.
  • the corrugations it is also possible for the corrugations to be produced prior to connection to the ring. In that case they should have a smaller diameter than the oblique rim so that the ring can be pushed on after this deformation.
  • the ring can be connected at the inside to the oblique rim of a corrugated tube closed at one end and at the outside to an oblique rim of a cup-shaped housing surrounding the corrugated tube.
  • the flange is connected to the corrugated tube on the inside in the same way as it is connected to the housing on the outside.
  • the ring is made in one piece with a cup-shaped housing surrounding the corrugated tube.
  • the finished bellows then consist of only two parts which have been connected in the manner according to the invention.
  • An apparatus for performing the method is characterised by a lower electrode with a higher central depression and a shallower annular depression adjoining same at the top and outside, and by an upper electrode with a conical end face.
  • the central depression then serves to receive a corrugated tube or a cylindrical corrugated tube blank.
  • the annular depression is intended to receive the ring.
  • the said components need merely be inserted in this depression, whereupon the upper electrode is pushed against the lower electrode. If desired, the oblique rim can be shaped simultaneously.
  • the central depression is lined with an insulating layer. This tends to guide the corrugated tube or blank at the outside without producing contact with the lower electrode.
  • FIG. 1 shows two electrodes after insertion of the corrugated tube blank and the ring
  • FIG. 2 shows the electrodes of FIG. 1 after producing the oblique rim
  • FIG. 3 is an enlarged representation of the contacting portions of the ring and oblique rim
  • FIG. 4 shows two other electrodes for joining the ring to a housing
  • FIG. 5 shows two electrodes in a modified method
  • FIG. 6 shows two electrodes according to a further embodiment of the method.
  • FIGS. 1 and 2 illustrate a lower electrode 1 and an upper electrode 2.
  • the lower electrode 1 has a central depression 3 which is lined with an electric insulating layer 4. Inserted in this central depression there is a corrugated tube blank 5 having the shape of a cylinder 7 closed by a base 6.
  • the blank 5 consists of a sheet of stainless steel of about 0.1 mm thickness.
  • annular depression 8 At the top and outside of the central depression 3, there is an adjoining annular depression 8 of shallower height containing a ring 9 of iron or ferrous material such as steel.
  • This ring is provided with a 4 to 8 ⁇ surface layer 10 by chemical nickel plating.
  • the ring orifice 11 is bounded at the top by a circular edge 12.
  • the upper electrode 2 has a conical end face 13 and is movable downwardly in the direction of the arrow. During this movement, the conical end face 13 engages in the end portion 14 of the blank 5 that projects beyond the ring 9. Since the base of the blank is supported at the bottom of the depression 3, the blank is widened and forms an oblique ring 15 which comes to lie against the edge 12 of the rim (FIG. 2). The oblique rim can, however, be preformed outside the electrodes.
  • the cylinder 7 is shaped to form the actual corrugated tube. This can be done in any desired known manner, for example by grooving the tube on the outside, inserting counterbearing segments in the grooves and finally using an internal hydraulic pressure to expand the parts between the segments outwardly.
  • FIG. 4 also shows a second lower electrode 17 and a second upper electrode 18.
  • the lower electrode has a central depression 19 in which a cup-shaped housing 20 of about 1.5 mm thick steel sheet is inserted.
  • This housing likewise has an oblique rim 21 which is adjoined by a flange 22 with which the housing lies on the top 23 of the lower electrode 17.
  • An outer circular edge 24 of the ring 9 co-operates with this oblique rim 21.
  • the upper electrode 18 presses on the ring and has an aperture 25 for receiving the oblique rim 15 of the corrugated tube 16.
  • a similar welded-soldered joint as along the line of contact A is then produced along the line of contact B. Although it is not absolutely necessary at this position, a surface layer produced by chemical nickel plating is harmless at this position.
  • FIG. 5 shows a lower electrode 31 having a central depression 32 which is lined with an insulating layer 33 and dimensioned so that it can receive a corrugated tube 34 which is closed at one end.
  • Its corrugations 35 have an external diameter which is less than the external diameter of the oblique rim 36, preferably even only slightly larger than its internal diameter. In this way the prefabricated corrugated tube 34 can be introduced in the depression 32, the oblique rim 36 coming into contact with the edge of the ring 37.
  • the upper electrode 38 may correspond to the upper electrode 2.
  • the lower electrode 41 is provided with a central depression 42 which is so large that it can receive a cup-shaped housing 43 which surrounds the prefabricated corrugated tube 44.
  • the ring 45 to which the oblique rim 46 of the corrugated tube is to be secured is made in one piece with the housing 43.
  • the upper electrode 47 may correspond to the upper electrode 2.
  • the housing 43 must be chemically nickel-plated at least in the region of the ring 45.
  • the corrugated tube may also consist of a copper alloy such as brass or tin bronze.
  • the ring may also consist of a copper alloy such as brass or a chrome-nickel alloy.
  • the corrugated tube one can also use a flat diaphragm. The lower electrode can then be correspondingly differently shaped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Measuring Fluid Pressure (AREA)
  • Detergent Compositions (AREA)
  • Resistance Heating (AREA)
US06/197,517 1977-04-27 1980-10-16 Method of making an apparatus containing a diaphragm Expired - Lifetime US4379961A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2718609 1977-04-27
DE2718609A DE2718609C2 (de) 1977-04-27 1977-04-27 Verfahren zur Herstellung einer eine Membran aufweisenden Vorrichtung und Vorrichtung zur Durchfuhrung dieses Verfahrens

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06048845 Continuation 1979-06-15

Publications (1)

Publication Number Publication Date
US4379961A true US4379961A (en) 1983-04-12

Family

ID=6007349

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/197,517 Expired - Lifetime US4379961A (en) 1977-04-27 1980-10-16 Method of making an apparatus containing a diaphragm

Country Status (12)

Country Link
US (1) US4379961A (da)
JP (1) JPS53133548A (da)
AT (1) AT371249B (da)
CA (1) CA1084247A (da)
CH (1) CH628555A5 (da)
DE (1) DE2718609C2 (da)
DK (1) DK158378C (da)
FR (1) FR2388631A1 (da)
GB (1) GB1599244A (da)
IT (1) IT1107329B (da)
NL (1) NL172520C (da)
SE (1) SE442097B (da)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477714A (en) * 1982-02-02 1984-10-16 Ina Walzlager Schaeffler Kg Method of leak proof attachment of a flange-type sheet metal element in the bore of a valve tappet
US4603095A (en) * 1985-04-23 1986-07-29 Emerson Electric Co. Universal seal
EP1857213A2 (de) * 2006-05-15 2007-11-21 Siemens Aktiengesellschaft Verfahren zum Herstellen eines Körpers
WO2013148386A1 (en) * 2012-03-30 2013-10-03 Siemens Energy, Inc. Method for resistance brazing
CN111168337A (zh) * 2020-03-06 2020-05-19 苏州事达同泰汽车零部件有限公司 一种商用车排气管的制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017138C2 (de) * 1980-05-05 1982-04-22 Danfoss A/S, 6430 Nordborg Verfahren zum Herstellen eines füllstutzenlosen Balgelements o.dgl. und Vorrichtung zur Durchführung dieses Verfahrens
JPS5823287A (ja) * 1981-08-04 1983-02-10 Shibaura Eng Works Co Ltd 井戸ポンプの部品取付方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2005256A (en) * 1934-01-02 1935-06-18 Heintz & Kaufman Ltd Method of spot welding refractory metals
US2614198A (en) * 1950-12-13 1952-10-14 Austin Motor Co Ltd Heat exchanger
US3140382A (en) * 1961-09-19 1964-07-07 Philips Corp Method of joining component parts of envelopes for high-power transistors
CA751046A (en) * 1967-01-17 N.V. Philips Gloeilampenfabrieken Method of joining metal parts
US3695297A (en) * 1970-05-23 1972-10-03 Pirelli Compensating pressure tank for oil-filled power cables

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA751046A (en) * 1967-01-17 N.V. Philips Gloeilampenfabrieken Method of joining metal parts
US2005256A (en) * 1934-01-02 1935-06-18 Heintz & Kaufman Ltd Method of spot welding refractory metals
US2614198A (en) * 1950-12-13 1952-10-14 Austin Motor Co Ltd Heat exchanger
US3140382A (en) * 1961-09-19 1964-07-07 Philips Corp Method of joining component parts of envelopes for high-power transistors
US3695297A (en) * 1970-05-23 1972-10-03 Pirelli Compensating pressure tank for oil-filled power cables

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4477714A (en) * 1982-02-02 1984-10-16 Ina Walzlager Schaeffler Kg Method of leak proof attachment of a flange-type sheet metal element in the bore of a valve tappet
US4603095A (en) * 1985-04-23 1986-07-29 Emerson Electric Co. Universal seal
EP0214077A1 (en) * 1985-04-23 1987-03-11 Emerson Electric Co. Seal, especially for a battery terminal
EP1857213A2 (de) * 2006-05-15 2007-11-21 Siemens Aktiengesellschaft Verfahren zum Herstellen eines Körpers
EP1857213A3 (de) * 2006-05-15 2008-06-25 Continental Automotive GmbH Verfahren zum Herstellen eines Körpers
WO2013148386A1 (en) * 2012-03-30 2013-10-03 Siemens Energy, Inc. Method for resistance brazing
CN111168337A (zh) * 2020-03-06 2020-05-19 苏州事达同泰汽车零部件有限公司 一种商用车排气管的制造方法
CN111168337B (zh) * 2020-03-06 2022-04-22 苏州事达同泰汽车零部件有限公司 一种商用车排气管的制造方法

Also Published As

Publication number Publication date
IT1107329B (it) 1985-11-25
NL7804131A (nl) 1978-10-31
CH628555A5 (de) 1982-03-15
ATA234278A (de) 1982-10-15
NL172520B (nl) 1983-04-18
DE2718609B1 (de) 1978-09-07
DK178378A (da) 1978-10-28
FR2388631A1 (fr) 1978-11-24
SE7804387L (sv) 1978-10-28
JPS53133548A (en) 1978-11-21
CA1084247A (en) 1980-08-26
FR2388631B1 (da) 1983-03-18
DE2718609C2 (de) 1979-05-23
AT371249B (de) 1983-06-10
DK158378C (da) 1990-10-22
SE442097B (sv) 1985-12-02
IT7867936A0 (it) 1978-04-26
GB1599244A (en) 1981-09-30
DK158378B (da) 1990-05-14
NL172520C (nl) 1983-09-16
JPS5639995B2 (da) 1981-09-17

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